Nitrogen toxicity - lockout

shiva71

shiva71

Well-Known Member
Weird things going on in bucket. After switching to bloom butes, pH shot up from 6 to 7, ppm dropped from 520 to 330 in 24 hours which is a huge drop. Also noticed spme rusty spots on the very top leaves. Possibly from the pH too high, i dunno. But it looks more like a Ca issue than a Mg issue this time so i brought her backup to 520 with base nutes and about 6ml of CalMag.
20230323_112318.jpg
 
shiva71

shiva71

Well-Known Member
The damage got much worse yesterday :( its so frustrating when plants get sick!
I gave her a big shot of CalMag cos it looked like a Ca deficiency which brought ppm up to 660 but after 12 hours that hadnt changed so i reduced it to 580. Noticed all the fan leave tips are looking a bit burned so i think im overfeeding.
But - my pH had got outta whack it was 6.8. Im really hoping the damage is from this. Thats 5.7 now.
But struggling with this girl atm :wall:
 
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shiva71

shiva71

Well-Known Member
Well shes hanging in there. Ive really tried to take on board what ive been told here and not to overfeed so ppm has been very low about 420 ish. But theres new signs of deficiency which again looks like Ca to me so ive bumped her up to about 480ppm with pure CalMag. Consisdering my water is about 170, 480 still seems like hardly anything but im holding back because i keep running into lockout issues from overfeeding and i definitely had some tip/nute burn issues.
New suspected Ca deficiency:
20230328_110200.jpg
You can see some of the tipburn i mentioned here
20230328_110142.jpg
Cheers!
 
Hollatchaboy

Hollatchaboy

Well-Known Member
shiva71 said:
Well shes hanging in there. Ive really tried to take on board what ive been told here and not to overfeed so ppm has been very low about 420 ish. But theres new signs of deficiency which again looks like Ca to me so ive bumped her up to about 480ppm with pure CalMag. Consisdering my water is about 170, 480 still seems like hardly anything but im holding back because i keep running into lockout issues from overfeeding and i definitely had some tip/nute burn issues.
New suspected Ca deficiency:
View attachment 5275580
You can see some of the tipburn i mentioned here
View attachment 5275581
Cheers!
Click to expand...
420ppm on what scale?
 
shiva71

shiva71

Well-Known Member
Hollatchaboy said:
420ppm on what scale?
Click to expand...
Thanks. Ummmm to be honest, ive never really paid any attention to that. I use whatever scale my Milwaukee pen has as its default. If i measure my rez as 600 one day and 500 the next then i assume my ppm has dropped. And vice versa. As long as im not taking different readings with different pens using different scales/settings, or converting EC to PPM then theres no confusion. I calibrate it every week.
 
shiva71

shiva71

Well-Known Member
Well, she is still alive but not looking great. I'll get something to smoke but not expecting amazing quality. The constantly rising ppm tells me shes not feeding, even now she is down at 340~ (tap water 180) so shes hardly getting anything, but still it goes up. Ph has been easier to control i just wish id see that ppm dropping which would tell me she is feeding. I think she had lockout from overfeeding and she never really recovered.
20230429_113232.jpg
 
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